CN101102005B - Engine multi-frequency band antenna - Google Patents
Engine multi-frequency band antenna Download PDFInfo
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- CN101102005B CN101102005B CN2007100439269A CN200710043926A CN101102005B CN 101102005 B CN101102005 B CN 101102005B CN 2007100439269 A CN2007100439269 A CN 2007100439269A CN 200710043926 A CN200710043926 A CN 200710043926A CN 101102005 B CN101102005 B CN 101102005B
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Abstract
The invention is concerned with the engine multi-frequency antenna, it includes: the medium board, the loop erecting vibrator, the declining band vibrator and the matching circuit in between of them, and the feeder terminal, all are on the medium board. The loop erecting vibrator is the vibrator on the same level banding entad in several times. The declining vibrator band entad four times. The invention provides the engine car multi-frequency antenna isn't only covering few railway radio communication frequencies but also reduces the volume of the antenna.
Description
Technical field
The present invention relates to the locomotive antenna, particularly engine multi-frequency band antenna.
Background technology
Along with railway communication, signalling technique are brought in constant renewal in the replacement, especially be exclusively used in the progressively construction of global mobile communication (GSM-R) in the china railway scope of railway, increasing wireless communication device applications is on locomotive.On China Railway High-speed train (CRH) motor train unit of newly starting, six pairs of antennas need be installed, the existing railway locomotive also will progressively increase antenna amount, because locomotive top erection space is limited, the installation site anxiety, cause the space isolation of multi-section antenna not enough, will produce interference between each antenna, cause reception/transmission signal quality poor, the operate as normal that is unfavorable for communication equipment, and then might have influence on the normal operation of train, the transformation to existing locomotive top is not only expensive big but also difficult simultaneously.
For addressing the above problem, need to integrate the antenna-feedback system of locomotive wireless communication system.Realize a plurality of equipment common antenna.Because the Wireless Telecom Equipment of locomotive is used different frequency ranges, this just requires can receive and launch the signal of different frequency range on the same antenna.
Because engine multi-frequency band antenna has all been made strict regulation to the apparent size and the performance of antenna key, for example highly is no more than 95mm, gain is not less than 0dBi etc.If need carrying out full frequency band, this Antenna Design covers, antenna frequencies covers will reach six octaves (457-2483.5MHz), according to antenna theory: the antenna that designs six octave bandwidths can only adopt discone antenna or helical antenna structure design, and the design size of this two antenna will be far longer than the size of specification requirement regulation.It almost is infeasible adopting existing antenna structure to carry out the Antenna Design of full frequency band covering (gain is greater than 0dBi) in the 95mm altitude range.
Summary of the invention
The objective of the invention is to, a kind of engine multi-frequency band antenna is provided, utilize the mode of array to form a plurality of resonance points, make this antenna at 457～469MHz, 821～934MHz, three frequency window resonance of 2400～2483.5MHz, to satisfy the signal that on the same antenna, receives and launch different frequency range, satisfy strict demand simultaneously to height and gain.
For reaching above-mentioned purpose, the present invention adopts following technical scheme:
A kind of engine multi-frequency band antenna comprises dielectric-slab, is located at the bending oscillator of upright oscillator of half-wave on the dielectric-slab and inclination and is located at feed port on the dielectric-slab, is match circuit between the bending oscillator of upright oscillator of described half-wave and inclination.
Further, the bending oscillator of described inclination is the oscillator that inwardly repeatedly bends on same horizontal plane.
Further, the bending oscillator of described inclination comprises first kink, second kink, the 3rd kink, the 4th kink, the 5th kink.
Further, the angle of the bending oscillator of described inclination and dielectric-slab is 50 degree.
Further, the upright oscillator of described half-wave is the copper pipe of diameter 10mm.
Further, the bending oscillator of described inclination is the copper pipe of diameter 5mm.
Further, the bending oscillator of described inclination comprises that also one connects the vertical connecting portion of dielectric-slab and first kink.
Further, the length of the upright oscillator of described half-wave is 72.5mm, the length of described vertical connecting portion is 12mm, the length of described first kink, second kink, the 3rd kink, the 4th kink, the 5th kink for Wei not 80mm, 13mm, 44mm, 36.5mm, 22mm, the angle of first kink and second kink, second kink and the 3rd kink, the 3rd kink and the 4th kink, the 4th kink and the 5th kink is respectively 110 degree, 120 degree, 55 degree, 35 degree.
Engine multi-frequency band antenna provided by the invention is not only contained all railway wireless communications bands, and can be reduced antenna volume.Satisfied strict demand to height and gain.
Description of drawings
Fig. 1 is engine multi-frequency band antenna embodiment of the present invention.
Embodiment
As shown in Figure 1, a kind of engine multi-frequency band antenna, the feed port that comprises dielectric-slab 1, is located at the upright oscillator 2 of half-wave on the dielectric-slab and bending oscillator 3 and is located on the dielectric-slab 1 is a match circuit 4 between upright oscillator 2 of described half-wave and the bending oscillator 3.
A kind of engine multi-frequency band antenna, comprising dielectric-slab 1, be located at upright oscillator 2 of half-wave on the dielectric-slab 1 and the bending oscillator 3 that tilts and be located at feed port (not shown) on the dielectric-slab 1, is match circuit 4 between upright oscillator 2 of described half-wave and the bending oscillator 3 that tilts.
Wherein, the bending oscillator 3 of described inclination is the oscillator that inwardly repeatedly bends on same horizontal plane.
Wherein, the bending oscillator 3 of described inclination is 50 degree with the angle of dielectric-slab 1, and promptly the angle of a5 is 140 degree among Fig. 1.
Wherein, the bending oscillator 3 of described inclination comprises first kink 32, second kink 33, the 3rd kink 34, the 4th kink 35, the 5th kink 36.
Wherein, the upright oscillator 2 of described half-wave is the copper pipe of diameter 10mm.
Wherein, the bending oscillator 3 of described inclination is the copper pipe of diameter 5mm.
Wherein, the bending oscillator of described inclination comprises that also one connects the vertical connecting portion 31 of dielectric-slab and first kink.
Wherein, the length of the upright oscillator 2 of described half-wave is 72.5mm, the length of described vertical connecting portion 31 is 12mm, the length of described first kink 32, second kink 33, the 3rd kink 34, the 4th kink 35, the 5th kink 36 for Wei not 80mm, 13mm, 44mm, 36.5mm, 22mm, angle a1, a2, a3, the a4 of first kink 32 and second kink 33, second kink 33 and the 3rd kink 34, the 3rd kink 34 and the 4th kink 35, the 4th kink 35 and the 5th kink 36 is respectively 110 degree, 120 degree, 55 degree, 35 degree.
The operation principle of engine multi-frequency band antenna of the present invention is as follows:
By Theoretical Calculation as can be known, (wavelength at 457～469MHz, 821～934MHz, 2400～2483.5MHz) central points is respectively aforementioned three frequency ranges: λ
462/ 4=162mm, λ
880/ 4=85mm, λ
2440/ 4=30mm, the effective depth of 880MHz frequency range and 2.4GHz frequency range oscillator is all in 95mm.Design for 880MHz and 2.4GHz frequency range oscillator, because the theoretical level of the oscillator of 1/4 wavelength of two frequency ranges is substantially near 3 times of relations, we can know that the signal of these two frequency ranges can both produce resonance on the oscillator of 1/4 wavelength of 880MHz according to antenna theory, therefore for 880MHz frequency range and 2.4GHz frequency range, two oscillators (upright oscillator 2 of half-wave and bending oscillator 3) can be merged into the upright over the ground oscillator of a half-wave and design.The bending oscillator cooperates the resonance of finishing the 450MHz frequency range jointly with upright oscillator among the figure.
Theoretical Calculation λ by the front
462/ 4=162mm much larger than the 95mm of specification requirement, can know according to antenna theory, by loading, add the length that means such as top, medium filling all can shorten oscillator.But after making 450MHz shorten to specific length by above-mentioned means, will bring 880MHz and 2.4GHz to seriously influence, multiband covers and can not realize substantially.In order to reduce of the influence of 450MHz oscillator to 880MHz and 2.4GHz signal, must make the 450MHz oscillator length keep resonance length substantially, simultaneous altitude can not surpass 95mm again, by a large amount of development tests, bending oscillator 3 among the present invention, guaranteeing to reach the purpose that reduces antenna effective height by the structure that changes oscillator under the constant situation of resonance length.These two oscillators constitute aerial array by a dielectric-slab 1 and match circuit 4, realize the requirement that each frequency range covers in limited height.
Two, the key technical indexes
(1) cover frequency range:
450MHz frequency range: 457.000～469.000MHz;
800MHz frequency range: 821.000～866.000MHz;
GSM-R frequency range: 885～934MHz;
2.4G frequency range: 2400～2483.5MHz
(2) impedance: 50 Ω;
(3) standing-wave ratio: be not more than 1.5;
(4) polarization mode: vertical;
(5) directivity: omnidirectional;
(6) gain: be not less than 0dBi;
(7) half-power beam (3dBi): 360 ° of (H)/60 ° (E);
(8) wind loading rating: 300km/h;
(9) power margin is not less than 50W;
(10) working temperature :-40 ℃～+ 70 ℃;
(11) interface type: N-KF5;
(12) antenna height: 95mm;
(13) base size: 145mm * 80mm.
Those skilled in the art only need be according to the mentality of designing and the above-mentioned operation principle of bending oscillator 3 provided by the invention, and the work that need not the property created can be designed the locomotive antenna that satisfies height and gain requirement.
The invention provides engine multi-frequency band antenna, have originality aspect the design of the analysis of aerial array and matching network and optimization, special-shaped half-wave dipole and the optimization; And its simple in structure, suitable dress property is strong, functional, is the desirable supporting antenna in the multi-functional multiband of locomotive radio station.
Claims (4)
1. engine multi-frequency band antenna, it is characterized in that: comprising dielectric-slab, be located at the bending oscillator of upright oscillator of half-wave on the dielectric-slab and inclination and be located at feed port on the dielectric-slab, is match circuit between the bending oscillator of upright oscillator of described half-wave and inclination; The bending oscillator of described inclination is the oscillator that inwardly repeatedly bends on same horizontal plane; The bending oscillator of described inclination comprises first kink, second kink, the 3rd kink, the 4th kink, the 5th kink; The bending oscillator of described inclination comprises that also one connects the vertical connecting portion of dielectric-slab and first kink; The length of the upright oscillator of described half-wave is 72.5mm, the length of described vertical connecting portion is 12mm, the length of described first kink, second kink, the 3rd kink, the 4th kink, the 5th kink is respectively 80mm, 13mm, 44mm, 36.5mm, 22mm, and the angle of first kink and second kink, second kink and the 3rd kink, the 3rd kink and the 4th kink, the 4th kink and the 5th kink is respectively 110 degree, 120 degree, 55 degree, 35 degree.
2. engine multi-frequency band antenna according to claim 1 is characterized in that: the bending oscillator of described inclination and the angle of dielectric-slab are 50 degree.
3. engine multi-frequency band antenna according to claim 2 is characterized in that: the upright oscillator of described half-wave is the copper pipe of diameter 10mm.
4. engine multi-frequency band antenna according to claim 3 is characterized in that: the bending oscillator of described inclination is the copper pipe of diameter 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100439269A CN101102005B (en) | 2007-07-17 | 2007-07-17 | Engine multi-frequency band antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100439269A CN101102005B (en) | 2007-07-17 | 2007-07-17 | Engine multi-frequency band antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101102005A CN101102005A (en) | 2008-01-09 |
| CN101102005B true CN101102005B (en) | 2011-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100439269A Active CN101102005B (en) | 2007-07-17 | 2007-07-17 | Engine multi-frequency band antenna |
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| Country | Link |
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| CN (1) | CN101102005B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713428B (en) * | 2018-12-26 | 2020-08-04 | 北京交通大学 | Multi-band high-gain antenna |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1290412A (en) * | 1997-10-28 | 2001-04-04 | 艾利森电话股份有限公司 | Multiple band, mutiple branch antenna for mobile phone |
| CN1365161A (en) * | 2001-01-17 | 2002-08-21 | 财团法人工业技术研究院 | Multiple frequency antenna device |
| US6891515B1 (en) * | 1999-06-10 | 2005-05-10 | Harada Industry Co., Ltd. | Multiband antenna |
| CN1702908A (en) * | 2004-05-24 | 2005-11-30 | 三立通讯设计有限公司 | Multiple frequency bands mobile terminal antenna metallic conductor |
| US7486242B2 (en) * | 2002-06-25 | 2009-02-03 | Fractus, S.A. | Multiband antenna for handheld terminal |
-
2007
- 2007-07-17 CN CN2007100439269A patent/CN101102005B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1290412A (en) * | 1997-10-28 | 2001-04-04 | 艾利森电话股份有限公司 | Multiple band, mutiple branch antenna for mobile phone |
| US6891515B1 (en) * | 1999-06-10 | 2005-05-10 | Harada Industry Co., Ltd. | Multiband antenna |
| CN1365161A (en) * | 2001-01-17 | 2002-08-21 | 财团法人工业技术研究院 | Multiple frequency antenna device |
| US7486242B2 (en) * | 2002-06-25 | 2009-02-03 | Fractus, S.A. | Multiband antenna for handheld terminal |
| CN1702908A (en) * | 2004-05-24 | 2005-11-30 | 三立通讯设计有限公司 | Multiple frequency bands mobile terminal antenna metallic conductor |
Non-Patent Citations (1)
| Title |
|---|
| 周荣生.一种多频段机车天线的研究.《GSM-R数字移动通讯学术研讨会论文集》.2005,118-121. * |
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| Publication number | Publication date |
|---|---|
| CN101102005A (en) | 2008-01-09 |
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Owner name: SHANGHAI XINHAI XINTONG INFORMATION TECHNOLOGY CO. Free format text: FORMER OWNER: CHINA RAILWAY SIGNAL + COMMUNICATION SHANGHAI ENGINEERING COMPANY Effective date: 20130506 |
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Effective date of registration: 20130506 Address after: 200436 Shanghai City, Zhabei District Province, No. 3 West Field Road, building 248 Patentee after: SHANGHAI XINHAI XINTONG INFORMATION TECHNOLOGY CO., LTD. Address before: 200436 No. 248 West Road, Shanghai Patentee before: China Railway Signal & Communication Shanghai Engineering Company |